EP0565237A1 - Leitfähiger Polyurethanschaumstoff - Google Patents

Leitfähiger Polyurethanschaumstoff Download PDF

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Publication number
EP0565237A1
EP0565237A1 EP19930301782 EP93301782A EP0565237A1 EP 0565237 A1 EP0565237 A1 EP 0565237A1 EP 19930301782 EP19930301782 EP 19930301782 EP 93301782 A EP93301782 A EP 93301782A EP 0565237 A1 EP0565237 A1 EP 0565237A1
Authority
EP
European Patent Office
Prior art keywords
substance
polyurethane foam
conduction mechanism
surfactant
ionic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19930301782
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English (en)
French (fr)
Other versions
EP0565237B1 (de
Inventor
Eiji Sawa
Hiroya Fukuda
Shohei Morikawa
Hitoshi Yaguchi
Yuichiro Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP4086008A external-priority patent/JP2601782B2/ja
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Publication of EP0565237A1 publication Critical patent/EP0565237A1/de
Application granted granted Critical
Publication of EP0565237B1 publication Critical patent/EP0565237B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/02—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0208—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus
    • G03G15/0216—Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices by contact, friction or induction, e.g. liquid charging apparatus by bringing a charging member into contact with the member to be charged, e.g. roller, brush chargers
    • G03G15/0233—Structure, details of the charging member, e.g. chemical composition, surface properties
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
    • G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
    • G03G15/0806—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller
    • G03G15/0818—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer on a donor element, e.g. belt, roller characterised by the structure of the donor member, e.g. surface properties
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1665—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat
    • G03G15/167—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer by introducing the second base in the nip formed by the recording member and at least one transfer member, e.g. in combination with bias or heat at least one of the recording member or the transfer member being rotatable during the transfer
    • G03G15/1685—Structure, details of the transfer member, e.g. chemical composition
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/0005—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium
    • G03G21/0058—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge for removing solid developer or debris from the electrographic recording medium using a roller or a polygonal rotating cleaning member; Details thereof, e.g. surface structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/1376—Foam or porous material containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31605—Next to free metal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31609—Particulate metal or metal compound-containing

Definitions

  • the present invention relates to electroconductive polyurethane foam suitable for use as a material for rollers which electrostatically control the object to be contacted, such as toner transfer rollers, charging rollers, development rollers, and cleaning rollers used in the printer for electrophotography and electrostatic recording system.
  • the system comprises mechanisms such as for (1) electrification, (2) exposure, (3) development, (4) transfer, (5) fixation and (6) discharging.
  • Each mechanism includes various types of rollers for precise control of the static electricity. Quality requirements for materials of such rollers are increasingly rigorous in recent years.
  • rollers used in the development mechanism such as toner transfer rollers, electrified rollers, development rollers, transfer rollers, and rollers used in the cleaning mechanism function to electrically control the object to be contacted
  • electroconductivity of their material must be stable against changes in the environmental conditions. For example, fluctuation in the resistance should remain within the range of one digit order, e.g. between 1 x 10 8 Q-cm and 1 x 10 9 Q-cm, when the ambient conditions are between 5°C at 30% relative humidity and 30°C at 85% relative humidity.
  • Flexible polyurethane foam is usually used as the material for such rollers as these rollers should not damage the precision parts such as photosensitive drum when contacted, or as the contact surface of the rollers must be increased for secure gripping. Moreover, because electrostatic control operation by these rollers is usually carried out in a very limited area, cell size of such polyurethane foam is required to be very fine.
  • Polyurethane obtained in (2) above is defective in that its conductivity (resistivity) is particularly dependent on the environment.
  • Polyurethane obtained in (3) above is defective in that in order to impregnate the carbon dispersion into the polyurethane foam, cells in the foam must be relatively large. If the cells are small, carbon particles will not penetrate into the foam (as the foam acts as a filter), and the conductivity will become uneven.
  • the present invention aims at providing electroconductive polyurethane foam with fine and uniform cells and conductivity which is relatively stable against changes in the environment.
  • starting materials for polyurethane foam are mixed and dispersed with substances having electron conduction mechanism and substances having ionic conduction mechanism, and then the mixture mechanically agitated with inert gas to foam.
  • the conductive polyurethane foam according to the present invention has a lower resistivity even when addition of fine conductive powder such as carbon is smaller than that used in the prior art because of its ion conductive mechanism .
  • Fine cells with uniform diameter distribution can also be obtained because of low viscosity of the system at the time of foaming. It is possible to obtain conductivity in the range of from 1x10 11 ⁇ -cm to 1 x 106 Q-cm with less dependence on the environment (in the order of one digit at 5°C x relative humidity 30% to 30°C x relative humidity 85%, e.g. in the range of from 1 x 10 3 Q-cm to 1 x 10 9 ⁇ -cm).
  • a mixture containing polyhydroxyl compound, organic polyisocyanate compound, catalyst, foam stabilizer and other additives is used.
  • the mixture is further added and dispersed with a substance with electron conduction mechanism such as carbon, a substance selected from among metal salts such as lithium, sodium and potassium and complex thereof, or metal salts of calcium and barium and complex thereof, and/or a substance with ionic conduction mechanism selected from among antistatic agent such as cationic surfactant, anioic surfactant, ampholytic surfactant, and non-ionic surfactant.
  • the mixture is then mechanically agitated with inert gas to cause the gas to be uniformly distributed in the system for stable foaming.
  • the foamed system is cured by heating.
  • Polyhydroxyl compounds to be used in the present invention include polyol, i.e. polyether polyol and polyester polyol terminated with hydroxyl group, as well as polyether polyesterpolyol which is a copolymer of the first two compounds: they are generally used for the production of soft polyurethane foam and urethane elastomer. So-called common polymer polyols that are obtained by polymerizing unsaturated ethylenic monomers in polyol can also be used. As a polyisocyanate compound, polyisocyanates commonly used for the production of soft polyurethane foam and urethane elastomer can be used.
  • TDI tolylene diisocyanate
  • MDI 4,4'-diphenylmethane diisocyanate
  • aliphatic polyisocyanates having 2 to 18 carbon atoms aliphatic polyisocyanates having 4 to 15 carbon atoms
  • aromatic polyisocyanates having 8 to 15 carbon atoms mixtures and modified compounds of such polyisocyanates such as prepolymers that are obtained by partially reacting polyisocyanates with polyol.
  • Catalysts to be used in the present invention include commonly known organic metal compounds such as dibutyltin dilaurate, tin octylate and zinc octylate, alkali and alkaline earth metals such as alkoxide and phenoxide, tertiary amines such as triethylamine, triethyldiamine, N-methyl morpholine and dimethylaminomethyl phenol, quaternary ammonium compounds, and imidazoles.
  • Nickel acetyl acetonate and nickel diacetyl acetonate may also be used.
  • Any known foam surfactant for foaming polyurethane may be used without restrictions.
  • Other additives that may be used when and if necessary include those generally used for the production of urethane foam such as pigments, dyes, and organic or inorganic fillers.
  • Particulate or fibrous substances having electron conduction mechanism may be used to give electroconductive product such as powder or chopped fiber strands of conductive carbon or graphite, powder or fibrous product of conductive metals such as copper, nickel and silver, metal oxides such as tin oxide, titanium oxide and indium oxide, various fillers plated with metal for conductivity, and electroconductive organic fine powders such as powder of polyacetylene, polypyrol and polyaniline.
  • Substances with ionic conduction mechanism to impart electroconductivity to the product include LiCF 3 , S0 3 , NaCl0 4 , LiCl0 4 , LiAsF 6 , LiBF 4 , NaSCN, KSCN and NaCI that are the metallic salts of Li + , Na + and K + in Group I of the periodic table, electrolytes of salts such as NH 4 + , metallic salts of Ca ++ , Ba ++ , etc.
  • complexes of the metallic salts with polyhydric alcohols and their derivatives such as 1,4 butanediol, ethylene glycol, polyethylene glycol, propylene glycol and polyethylene glycol, and complexes of metallic salts with mono-ols such as ethylene glycol, monomethyl ether and ethylene glycol monoethyl ether.
  • the foamed product was then poured into a mold measuring 100 mm x 100 mm x 50 mm (depth), heated and cured at 140°C for minutes, and then cut into slices to measure the cell diameter, conductivity, etc.
  • the foamed product had uniform cells with the density of 0.52 g/cm 3 and cell diameter of 200 ⁇ m or less.
  • Volume resistivity of the product cut into a 2mm-thick slice was measured by using resistivity cells, i.e. Resistance Meters 4329A and 16008A by Yokogawa Hewlett-Packard, Ltd and in accordance with JIS-K6911. In the graph of Fig.
  • the symbol A represents a foamed product of Example 1 containing 1 part of conductive carbon and 0.5 part of LiCl0 4 complex (MP-100-A), and the symbol B a foamed product containing 2 parts of conductive carbon and 1 part of Li-CI0 4 .
  • the symbols C through E denote those containing only conductive carbon at 0.5, 1 and 2 part(s) respectively.
  • the environment dependence of conductivity of the foamed products was investigated. As shown in Fig. 1, foamed products added with conductive carbon alone (C through E) showed dependence on the environment. Addition of LiCl0 4 complex (A, B) decreased dependence of conductivity on the environment.
  • a roller having the structure shown in Fig. 6 was made using the polyurethane foam of Example 1 and was used as a transfer roller. Uniform images were obtained. Excellent images were also obtained when the roller was used as the charging roller.
  • the reference number 1 denotes conductive polyurethane foam and 2 denotes a metal shaft.
  • Polyurethane foam obtained by adding 0.5 to 2 parts of carbon alone without the addition of LiCl0 4 complex had the density of 0.52 g/cm 3 .
  • Polyurethane foam added with 2 parts of carbon was particularly coarse, with the mean cell diameter of 500 ⁇ m and showed higher environment dependence of conductivity.
  • the product "AUP” by Nippon Kokuen Ltd contains 99% of solid carbon and 1% of ash with the mean diameter of 0.7 um.
  • the reference L in the graph of Fig. 3 represents a system where no substances with electron or ionic conduction mechanism are added, M a system added with 0.5 part of MP-100-A alone, and N a system added with 1.0 part of MP-100-A alone.
  • Polyurethane foam according to the present invention has both electron and ionic conduction mechanisms with relatively high stability against changes in the environment. Mechanical agitation employed in the present invention also produces cells that are fine and uniform in size.
  • antistatic agents selected from cationic surfactant such as quaternary ammonium compounds, anionic surfactant such as aliphatic sulfonate, higher alkyl sulfate, higher alkyl ether sulfate, higher alkyl phosphate, and higher alkyl ether phosphate, ampholytic surfactant such as betaine, non-ionic surfactant such as higher alcohol ethylene oxide, polyethylene glycol fatty acid ester, and polyvalent alcohol fatty acid ester, such antistatic agents having a group with at least one active hydrogen atom which reacts with isocyanate such as hydroxyl group, carboxyl group, primary or secondary amine group.
  • cationic surfactant such as quaternary ammonium compounds
  • anionic surfactant such as aliphatic sulfonate, higher alkyl sulfate, higher alkyl ether sulfate, higher alkyl phosphate, and higher alkyl ether phosphate
  • the foamed product after curing had uniform cells at the density of 0.52 g/cm 3 and cell diameter of 200 f..lm.
  • Volume resistivity of the product sliced into 2 mm thick sheets was measured by using resistivity cells, i.e. High Resistance Meters 4329Aand 16008A by Yokogawa Hewlett-Packard and in accordance with JIS-K6911.
  • the reference II denotes a foamed product with conductive carbon addition (1 part) alone.
  • the reference III denotes a foamed product containing quaternary ammonium compound alone. It contains 20 parts of LAROSTAT 377DPG.
  • the foamed product IV contains 1 part of conductive carbon, 10 parts of LAROSTAT and 0.05 part of MP-100-E as substances with ionic conduction mechanism. Environment dependence of conductivity was investigated with respect to these foamed products. As shown in Fig. 4, those products added with carbon alone (product II) and with quaternary ammonium compound alone (product III) showed higher dependence, whereas combined use of carbon and quaternary ammonium compound (product I) could reduce dependence of conductivity on environment significantly. In a much wider temperature range except at low temperatures, the foamed products according to the present invention showed a lower resistance than the product with carbon addition alone if the amount of carbon addition was the same.
  • the reference V denotes a product which contains 2 parts of conductive carbon given in Example 4 and 15 parts of non-ionic antistatic agent (STATURE).
  • the product VI is added with 2 parts of conductive carbon alone.
  • the product VII contains 15 parts of STATURE alone as the non-ionic antistatic agent.
  • Environment dependence of conductivity was investigated. As shown in Fig. 5, products added with either carbon (VI) and non-ionic antistatic agent (VII) alone respectively showed higher environment dependence, whereas the products added with both carbon and non-ionic antistatic agent showed a decrease in environment dependence.
  • Conductive polyurethane foams according to the present invention not only show electron conduction mechanism and ionic conduction mechanism, but are highly stable against environmental changes. Moreover, mechanical agitation employed in the present invention produces fine and uniform cells.

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Plasma & Fusion (AREA)
  • Inorganic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP19930301782 1992-03-09 1993-03-09 Leitfähiger Polyurethanschaumstoff Expired - Lifetime EP0565237B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP4086008A JP2601782B2 (ja) 1992-03-09 1992-03-09 導電性ポリウレタンフォーム
JP86008/92 1992-03-09
JP19498992 1992-06-29
JP194989/92 1992-06-29

Publications (2)

Publication Number Publication Date
EP0565237A1 true EP0565237A1 (de) 1993-10-13
EP0565237B1 EP0565237B1 (de) 1998-05-13

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EP19930301782 Expired - Lifetime EP0565237B1 (de) 1992-03-09 1993-03-09 Leitfähiger Polyurethanschaumstoff

Country Status (3)

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US (1) US5656344A (de)
EP (1) EP0565237B1 (de)
DE (1) DE69318469T2 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5629050A (en) * 1995-08-30 1997-05-13 The Dow Chemical Company Process for preparing coated articles
WO1997020255A1 (en) * 1995-11-29 1997-06-05 Rogers Corporation Conductive roller with conductive heat shrink tubing surface
EP1184397A1 (de) * 2000-08-29 2002-03-06 Tokai Rubber Industries, Ltd. Polyurethan-Elastomer Zusammenstzung für Förderband Transportrollen und daraus hergestellte Förderband Transportrollen
WO2015184155A1 (en) 2014-05-30 2015-12-03 University Of Connecticut Graphene/graphite polymer composite foam derived from emulsions stabilized by graphene/graphite kinetic trapping
CN109438964A (zh) * 2018-10-15 2019-03-08 重庆工商大学 兼具增强以及抗静电性能的轻质聚氨酯泡沫及其制备方法

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US5695859A (en) * 1995-04-27 1997-12-09 Burgess; Lester E. Pressure activated switching device
US5776372A (en) * 1995-05-29 1998-07-07 Nisshinbo Industries, Inc. Carbon composite material
US6023597A (en) * 1995-05-30 2000-02-08 Canon Kabushiki Kaisha Cellular conductive roller with conductive powder filling open cells in the surface
US5933693A (en) * 1997-02-12 1999-08-03 Bridgestone Corporation Electroconductive elastic member and electrophotographic apparatus using same
US5953039A (en) * 1997-11-24 1999-09-14 Eastman Kodak Company Photothermographic drum processor using low heat conductivity and low heat capacitance rollers
US6074807A (en) * 1998-10-15 2000-06-13 Eastman Kodak Company Imaging element containing an electrically-conductive layer containing acicular metal-containing particles and a transparent magnetic recording layer
US6035163A (en) * 1998-11-20 2000-03-07 Xerox Corporation Vibration absorbing bias charge roll
JP3022859B1 (ja) * 1998-12-16 2000-03-21 株式会社金陽社 導電性ロール及びその製造方法
US6977011B2 (en) * 1999-06-18 2005-12-20 Voith Paper Patent Gmbh Roller provided for use in coating machines
JP4508562B2 (ja) * 2002-08-30 2010-07-21 キヤノン株式会社 転写部材、及びこれを用いた画像形成装置
US7008565B2 (en) * 2002-11-08 2006-03-07 More Energy Ltd. Flexible electroconductive foam, and method of preparation thereof
US7005458B2 (en) * 2003-06-20 2006-02-28 Foamex L.P. Static dissipative polyurethane foams
US20060020100A1 (en) * 2004-07-20 2006-01-26 Shirley Lee Conductive agents for polyurethane
US7173805B2 (en) * 2004-07-20 2007-02-06 Hewlett-Packard Development Company, L.P. Polymer material
KR101280042B1 (ko) * 2006-08-23 2013-07-01 삼성전자주식회사 화상형성장치용 현상기의 공급롤러 및 그의 제조방법
FI20075683L (fi) * 2007-09-28 2009-03-29 Valtion Teknillinen Uusi materiaali, prosessi sen valmistamiseksi ja uudet käytöt
US9534098B2 (en) 2010-02-26 2017-01-03 Peterson Chemical Technology, Llc. Enhanced thermally conductive cushioning foams by addition of metal materials
EP2969470B1 (de) 2013-03-15 2019-02-20 Owens Corning Intellectual Capital, LLC Verarbeitungshilfsmittel zur verwendung bei der herstellung extrudierter polystyrolschaumstoffe mithilfe von treibmitteln mit niedrigem potenziellem beitrag zur globalen erwärmung
WO2016176384A1 (en) * 2015-04-28 2016-11-03 Owens Corning Intellectual Capital, Llc Methods of manufacturing extruded polystyrene foams using conductive polymers as an infrared attenuation agent
US11814566B2 (en) 2020-07-13 2023-11-14 L&P Property Management Company Thermally conductive nanomaterials in flexible foam
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